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  2. Orexin - Wikipedia

    en.wikipedia.org/wiki/Orexin

    Orexin (/ ɒ ˈ r ɛ k s ɪ n /), also known as hypocretin, is a neuropeptide that regulates arousal, wakefulness, and appetite. [5] It exists in the forms of orexin-A and orexin-B.The most common form of narcolepsy, type 1, in which the individual experiences brief losses of muscle tone ("drop attacks" or cataplexy), is caused by a lack of orexin in the brain due to destruction of the cells ...

  3. Lateral hypothalamus - Wikipedia

    en.wikipedia.org/wiki/Lateral_hypothalamus

    The lateral hypothalamus (LH), also called the lateral hypothalamic area (LHA), [1] contains the primary orexinergic nucleus within the hypothalamus that widely projects throughout the nervous system; [2] this system of neurons mediates an array of cognitive and physical processes, such as promoting feeding behavior and arousal, reducing pain perception, and regulating body temperature ...

  4. Dopaminergic pathways - Wikipedia

    en.wikipedia.org/wiki/Dopaminergic_pathways

    The nigrostriatal pathway is involved in behaviors relating to movement and motivation. The transmission of dopaminergic neurons to the dorsal striatum particularly plays a role in reward and motivation while movement is influenced by the transmission of dopaminergic neurons to the substantia nigra.

  5. Orexin-A - Wikipedia

    en.wikipedia.org/wiki/Orexin-A

    Once made, the orexin peptides can bind to the orexin receptor; which is a G protein-coupled receptor. This receptor senses molecules outside the cell and activates inside signal transduction pathways to elicit cellular responses. Research shows that an absence of orexin-A appears to cause narcolepsy. Deficit amounts of orexin-A will make ...

  6. Cataplexy - Wikipedia

    en.wikipedia.org/wiki/Cataplexy

    Cataplexy is the first symptom to appear in about 10% of cases of narcolepsy, [2] caused by an autoimmune destruction of hypothalamic neurons that produce the neuropeptide hypocretin (also called orexin), which regulates arousal and has a role in stabilization of the transition between wake and sleep states. [3]

  7. Hypocretin (orexin) receptor 1 - Wikipedia

    en.wikipedia.org/wiki/Hypocretin_(orexin)_receptor_1

    The orexin 1 receptor (OX 1), is a G-protein coupled receptor that is heavily expressed in projections from the lateral hypothalamus and is involved in the regulation of feeding behaviour. OX 1 selectively binds the orexin-A neuropeptide. It shares 64% identity with OX 2. [5]

  8. SB-334867 - Wikipedia

    en.wikipedia.org/wiki/SB-334867

    SB-334867 is an orexin antagonist.It was the first non-peptide antagonist developed that is selective for the orexin receptor subtype OX 1, with around 50x selectivity for OX 1 over OX 2 receptors. [1]

  9. Orexin receptor - Wikipedia

    en.wikipedia.org/wiki/Orexin_receptor

    The orexin receptor (also referred to as the hypocretin receptor) is a G-protein-coupled receptor that binds the neuropeptide orexin. There are two variants, OX 1 and OX 2 , each encoded by a different gene ( HCRTR1 , HCRTR2 ).